... /carbon steel, brass, aluminium 3.zinc plated,hdg,black carriage bolt Itemcarriage boltMaterial of carriage boltCarbon steel(,Q235,C1010,C1020,C1040 ... M30 M32(Regular size)Length of carriage bolt8-300mmPayment TermT/T,L/C,etc.PortShenzhen or ShanghaiPackagementPoly bags+chipboard carton(20x20x15cm ...